Endovascular graft coatings
    3.
    发明授权
    Endovascular graft coatings 失效
    血管内移植物涂层

    公开(公告)号:US07220276B1

    公开(公告)日:2007-05-22

    申请号:US09519246

    申请日:2000-03-06

    IPC分类号: A61F2/06

    摘要: An endovascular graft, having both an expandable stent portion and a stent cover portion positioned, the graft itself and/or a stent cover-portion coated with a bioactive agent adapted to promote initial thrombus formation, preferably followed by long term fibrous tissue ingrowth. The endovascular graft prevents endoleaking by promoting a short term hemostatic effect in the perigraft region. This short term effect can, in turn, be used to promote or permit long term fibrous tissue ingrowth. Particularly where the stent cover portion is prepared from a porous material selected from PET and ePTFE, the bioactive agent can include a thrombogenic agent such as collagen covalently attached in the form of a thin, conformal coating on at least the outer surface of the stent cover. An optimal coating of this type is formed by the activation of photoreactive groups.

    摘要翻译: 一种血管内移植物,其具有定位的可扩张的支架部分和支架覆盖部分,移植物本身和/或涂覆有适于促进初始血栓形成的生物活性剂的支架覆盖部分,优选地是长期纤维组织向内生长。 血管内移植物通过在周边区域促进短期止血作用来防止内分泌。 这种短期效应又可用于促进或允许长期的纤维组织向内生长。 特别是在支架覆盖部分由选自PET和ePTFE的多孔材料制备的情况下,生物活性剂可以包括血栓形成剂,例如在支架盖的至少外表面上以薄的保形涂层的形式共价附着的胶原 。 通过激活光反应性基团形成这种类型的最佳涂层。

    Crosslinkable macromers
    5.
    发明授权

    公开(公告)号:US07094418B2

    公开(公告)日:2006-08-22

    申请号:US10990582

    申请日:2004-11-17

    IPC分类号: A61F2/06 A61F2/28 A61F13/00

    摘要: A crosslinkable macromer system and related methods of preparing the system and using the system in the form of a crosslinked matrix between a tissue site and an implant article such as a tissue implant or on the porous surface of a prosthetic device. The macromer system includes two or more polymer-pendent polymerizable groups and one or more initiator groups (e.g., polymer-pendent initiator groups). The polymerizable groups and the initiator group(s), when polymer-pendent, can be pendent on the same or different polymeric backbones. The macromer system provides advantages over the use of polymerizable macromers and separate, low molecular weight initiators, including advantages with respect to such properties as nontoxicity, efficiency, and solubility. A macromer system of the invention can be used as an interface between the tissue site and implant article in a manner sufficient to permit tissue growth through the crosslinked matrix and between the tissue site and implant. In a preferred embodiment, polymers with pendent polymerizable groups, for use in the macromer system, are prepared by reacting a polysaccharide polymer with a reactive moiety in an organic, polar solvent such as formamide.

    Crosslinkable macromers
    8.
    发明授权
    Crosslinkable macromers 失效
    可交联的大分子单体

    公开(公告)号:US06410044B1

    公开(公告)日:2002-06-25

    申请号:US09571525

    申请日:2000-05-16

    IPC分类号: A61F206

    摘要: A crosslinkable macromer system and related methods of preparing the system and using the system in the form of a crosslinked matrix between a tissue site and an implant article such as a tissue implant or on the porous surface of a prosthetic device. The macromer system includes two or more polymer-pendent polymerizable groups and one or more initiator groups (e.g., polymer-pendent initiator groups). The polymerizable groups and the initiator group(s), when polymer-pendent, can be pendent on the same or different polymeric backbones. The macromer system provides advantages over the use of polymerizable macromers and separate, low molecular weight initiators, including advantages with respect to such properties as nontoxicity, efficiency, and solubility. A macromer system of the invention can be used as an interface between the tissue site and implant article in a manner sufficient to permit tissue growth through the crosslinked matrix and between the tissue site and implant. In a preferred embodiment, polymers with pendent polymerizable groups, for use in the macromer system, are prepared by reacting a polysaccharide polymer with a reactive moiety in an organic, polar solvent such as formamide.

    摘要翻译: 一种可交联的大分子单体系统和相关的制备该系统的方法以及在组织部位和植入物制品例如组织植入物或假体装置的多孔表面之间使用交联基质形式的系统。 大分子单体体系包括两个或多个聚合物侧基可聚合基团和一个或多个引发剂基团(例如聚合物 - 侧基引发剂基团)。 当聚合物侧链可聚合基团和引发剂基团可以悬挂在相同或不同的聚合物主链上。 大分子单体体系提供优于使用可聚合的大分子单体和分离的低分子量引发剂,包括关于无毒性,效率和溶解性等性质的优点。 本发明的大分子单体系统可以以足以允许组织生长通过交联基质和组织部位和植入物之间的方式用作组织部位和植入物之间的界面。 在优选的实施方案中,用于大分子单体体系中的具有侧链可聚合基团的聚合物通过使多糖聚合物与有机极性溶剂如甲酰胺中的反应性部分反应来制备。

    Cell culture support containing a cell adhesion factor and a
positively-charged molecule
    10.
    发明授权
    Cell culture support containing a cell adhesion factor and a positively-charged molecule 失效
    含有细胞粘附因子和带正电荷的分子的细胞培养支持物

    公开(公告)号:US5512474A

    公开(公告)日:1996-04-30

    申请号:US208916

    申请日:1994-03-09

    IPC分类号: C12N5/00 C12M3/00 C12N11/08

    摘要: A combination of a cell adhesion factor and a positively-charged molecule are bound to the surface of a cell culture support of a bioreactor to improve cell attachment and stabilize cell growth. The positively charged molecule is preferably polylysine, chitosan, poly(ethyleneimine) or acrylics polymerized from acrylamide or methacrylamide and incorporating positively-charged groups in the form of primary, secondary or tertiary amines, or quaternary salts. The cell adhesion factor is preferably fibronectin, laminin, collagen, vitronectin or tenascin, or fragments or analogs having a cell binding domain thereof. The positively-charged molecule and the cell adhesion factor can be covalently bound to the supporting surface. In another embodiment, the positively-charged molecule and the cell adhesion factor are covalently bound to one another and either the positively-charged molecule or the cell adhesion factor is covalently bound to the supporting surface. Also, the positively-charged molecule or the cell adhesion factor or both cam be provided in the form of a stable coating non-covalently bound around the surface of the support. The cell culture support may be in the form of a microcarrier and can be made of polystyrene or polypropylene

    摘要翻译: 细胞粘附因子和带正电荷的分子的组合结合到生物反应器的细胞培养支持物的表面,以改善细胞附着并稳定细胞生长。 带正电荷的分子优选为聚丙烯酰胺,壳聚糖,聚(乙烯亚胺)或丙烯酸酯,由丙烯酰胺或甲基丙烯酰胺聚合并引入伯胺,仲胺或叔胺或季盐形式的带正电荷的基团。 细胞粘附因子优选是纤连蛋白,层粘连蛋白,胶原,玻连蛋白或腱生蛋白,或其具有细胞结合结构域的片段或类似物。 带正电的分子和细胞粘附因子可以共价结合到支持表面。 在另一个实施方案中,带正电荷的分子和细胞粘附因子彼此共价结合,并且带正电荷的分子或细胞粘附因子共价结合到支持表面。 此外,带正电荷的分子或细胞粘附因子或两个凸轮以不是共价结合在支撑体表面上的稳定涂层的形式提供。 细胞培养载体可以是微载体的形式,并且可以由聚苯乙烯或聚丙烯制成